CVE-2021-30731: Apple Mac OS X

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Catalina. An unprivileged application may be able to capture USB devices.

Affected products

• Apple Mac OS X: from 10.15, up to and including 10.15.6; version 10.15.7 only
• Apple macOS: from 11.0.1, before 11.4 (fixed in 11.4)

Published 2021-09-08. Last modified 2026-06-17.